package net.uiiang.android.BiscuitBoxDemo.widget;

import net.uiiang.android.BiscuitBox.R;
import net.uiiang.android.BiscuitBox.widget.CoverFlow;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class CoverFlowExample extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        CoverFlow coverFlow;
        coverFlow = new CoverFlow(this);

        coverFlow.setAdapter(new ImageAdapter(this));

        ImageAdapter coverImageAdapter = new ImageAdapter(this);

        // coverImageAdapter.createReflectedImages();

        coverFlow.setAdapter(coverImageAdapter);

        coverFlow.setSpacing(-25);
        coverFlow.setSelection(4, true);
        coverFlow.setAnimationDuration(1000);

        setContentView(coverFlow);
    }

    public class ImageAdapter extends BaseAdapter {
        int mGalleryItemBackground;
        private Context mContext;
        private ImageView[] mImages;
        private Integer[] mImageIds = { R.drawable.photo1,
                R.drawable.photo2, R.drawable.photo3,
                R.drawable.photo4, R.drawable.photo6,
                R.drawable.photo5, R.drawable.gallery_photo_7,
                R.drawable.gallery_photo_8 };


        public ImageAdapter(Context c) {
            mContext = c;
            mImages = new ImageView[mImageIds.length];
        }

        public boolean createReflectedImages() {
            // The gap we want between the reflection and the original image
            final int reflectionGap = 4;

            int index = 0;
            for (int imageId : mImageIds) {
                Bitmap originalImage = BitmapFactory.decodeResource(
                        getResources(), imageId);
                int width = originalImage.getWidth();
                int height = originalImage.getHeight();

                // This will not scale but will flip on the Y axis
                Matrix matrix = new Matrix();
                matrix.preScale(1, -1);

                // Create a Bitmap with the flip matrix applied to it.
                // We only want the bottom half of the image
                Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
                        height / 2, width, height / 2, matrix, false);

                // Create a new bitmap with same width but taller to fit
                // reflection
                Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
                        (height + height / 2), Config.ARGB_8888);

                // Create a new Canvas with the bitmap that's big enough for
                // the image plus gap plus reflection
                Canvas canvas = new Canvas(bitmapWithReflection);
                // Draw in the original image
                canvas.drawBitmap(originalImage, 0, 0, null);
                // Draw in the gap
                Paint deafaultPaint = new Paint();
                canvas.drawRect(0, height, width, height + reflectionGap,
                        deafaultPaint);
                // Draw in the reflection
                canvas.drawBitmap(reflectionImage, 0, height + reflectionGap,
                        null);

                // Create a shader that is a linear gradient that covers the
                // reflection
                Paint paint = new Paint();
                LinearGradient shader = new LinearGradient(0, originalImage
                        .getHeight(), 0, bitmapWithReflection.getHeight()
                        + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
                // Set the paint to use this shader (linear gradient)
                paint.setShader(shader);
                // Set the Transfer mode to be porter duff and destination in
                paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
                // Draw a rectangle using the paint with our linear gradient
                canvas.drawRect(0, height, width, bitmapWithReflection
                        .getHeight()
                        + reflectionGap, paint);

                ImageView imageView = new ImageView(mContext);
                imageView.setImageBitmap(bitmapWithReflection);
                imageView.setLayoutParams(new CoverFlow.LayoutParams(120, 180));
                imageView.setScaleType(ScaleType.MATRIX);
                mImages[index++] = imageView;

            }
            return true;
        }

        public int getCount() {
            return mImageIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {

            // Use this code if you want to load from resources
            ImageView i = new ImageView(mContext);
            i.setImageResource(mImageIds[position]);
            i.setLayoutParams(new CoverFlow.LayoutParams(130, 130));
            i.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

            // Make sure we set anti-aliasing otherwise we get jaggies
            BitmapDrawable drawable = (BitmapDrawable) i.getDrawable();
            drawable.setAntiAlias(true);
            return i;

            // return mImages[position];
        }

        /**
         * Returns the size (0.0f to 1.0f) of the views depending on the
         * 'offset' to the center.
         */
        public float getScale(boolean focused, int offset) {
            /* Formula: 1 / (2 ^ offset) */
            return Math.max(0, 1.0f / (float) Math.pow(2, Math.abs(offset)));
        }

    }
}
